<template>
  <div class="col-md-4">
    <form class="form-horizontal">
      <div class="form-group">
        <label>用户名</label>
        <input type="text" class="form-control" placeholder="用户名" v-model="name">
      </div>
      <div class="form-group">
        <label>评论内容</label>
        <textarea class="form-control" rows="6" placeholder="评论内容" v-model="content"></textarea>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <button type="button" class="btn btn-default pull-right" @click="add">提交</button>
        </div>
      </div>
    </form>
  </div>
</template>

<script>
  export default {
    name: 'add',
    props:{
      addComment:{ //指定属性名、属性类型、必要性（复杂的写法）
        type: Function,
        required:true
      },
    },
    data(){
      return{
        name: '',
        content: ''
      }
    },
    methods:{
      add(){
        //1.检查输入的合法性
        const name = this.name.trim();
        const content = this.content.trim();
        if(!name || !content){
          alert('【用户名】和【评论内容】不有为空！');
          return;
        }
        //2.根据输入的值，封装成一个comment对象
        const comment = {
          name,
          content
        }
        //3.添加到comments中
        this.addComment(comment);
        //4.清空输入
        this.name = "";
        this.content="";

      }
    }
  }
</script>

<style scoped>

</style>
